Papers: Forest Communities in a Natural Site at Union Hill, and Comparisons With Other Forests in Illinois; The Vegetation of an Abandoned Road After a Half Century of Development; Helminths of Three Sympatric Species of Cave-Dwelling...

Papers, Addresses, Reports: American Science in the Philippines (Presidential address); The Trusteeship of the National Park Service; The Benefits and Dangers of our Natural Heritage; Extract from the Report of the Section Chairman...